It seems odd that so few understand the dynamics of exponential growth on even a basic level.
My crystal ball predicts a movement towards decentralization of mining. Larger mines find it difficult of survive large $/btc swings for extended periods.
PS: Try running a mining calculator on some current devices where the difficulty increases around 2% per cycle and see what happens. It's raining ROI like never before for devices you can have delivered in a few days on the secondary market. Expect prices on second-hand devices to go through the ceiling shortly. Even at current prices, a 1Th machine with 1KW usage will make around $85/month after electricity costs. Projections at 2% per cycle says 100% ROI in 3 months, and profits continue well into 2016.
I actually look forward to seeing hashing units back online at this rate of growth
(Honestly first time in a long time I have even considered looking at mining)
Stable generation and cheap units with to my knowledge little in way of new units for a while means their is a chance at ROI given the lower bitcoin prices and the stable difficulty.
That said it was a heck of a long rise this time around.